1489497643 has 2 divisors, whose sum is σ = 1489497644. Its totient is φ = 1489497642.

The previous prime is 1489497617. The next prime is 1489497671. The reversal of 1489497643 is 3467949841.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1489497643 is a prime.

It is not a weakly prime, because it can be changed into another prime (1489497613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 744748821 + 744748822.

It is an arithmetic number, because the mean of its divisors is an integer number (744748822).

Almost surely, 2^1489497643 is an apocalyptic number.

1489497643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1489497643 is an equidigital number, since it uses as much as digits as its factorization.

1489497643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5225472, while the sum is 55.

The square root of 1489497643 is about 38594.0104549916. The cubic root of 1489497643 is about 1142.0363835798.

The spelling of 1489497643 in words is "one billion, four hundred eighty-nine million, four hundred ninety-seven thousand, six hundred forty-three".